70 lines
1.3 KiB
Python
70 lines
1.3 KiB
Python
#!/usr/bin/python3
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from numpy import zeros
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from timeit import default_timer
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def is_pandigital(value, n):
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i = 0
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digits = zeros(n + 1, int)
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while i < n and value > 0:
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digit = value % 10
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digits[digit] = digits[digit] + 1
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value = value // 10
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i = i + 1
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if i < n or value > 0:
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return 0
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if digits[0] != 0:
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return 0
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for i in range(1, n+1):
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if digits[i] != 1:
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return 0
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i = i + 1
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return 1
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def main():
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start = default_timer()
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max_ = 0
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for i in range(1, 10000):
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n = 0
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j = 1
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while 1:
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tmp = i * j
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n = n + tmp
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j = j + 1
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if n > max_ and is_pandigital(n, 9):
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max_ = n
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if i * j < 10:
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n = n * 10
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elif i * j < 100:
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n = n * 100
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elif i * j < 1000:
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n = n * 1000
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elif i * j < 10000:
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n = n * 10000
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elif i * j < 100000:
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n = n * 100000
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if n > 987654321:
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break
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end = default_timer()
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print('Project Euler, Problem 38')
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print('Answer: {}'.format(max_))
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print('Elapsed time: {:.9f} seconds'.format(end - start))
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if __name__ == '__main__':
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main()
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